After III
The Tamaraw-5RHTX-IIII is the fourth variant of the Tamaraw 5 fith generation tank series, jointly developed by RHTX and later cooperation with Great Nexo for the United Maharlika Republic. It retains the heavy 135mm smoothbore gun with guided, rail-assist hypersonic smoothbore, aim assist main gun, programmable, and smart munitions, but introduces a refined AI-assisted fire control system capable of synchronized multi-target tracking.

The secondary armament consists of a remote-operated 40mm automatic cannon paired integrated by helmet-linked control system wchich that allows the commander or gunner to direct the weapons through head movement and 50 cal HMG in the 135mm left side.

This provides extremely fast reaction capability against drones, infantry, and light vehicles.

Protection is enhanced by the upgraded Kalasag APS-II, composite-tungsten layered armor, and an active anti-drone electronic warfare jammer system. The tank also features improved thermal/IR sensors and networked battlefield data integration, allowing it to operate seamlessly with UAV reconnaissance and artillery strike networks.

First deployed widely during the later phase of the Lisastani War, the Tamaraw-5RHTX-IIII earned a reputation for high survivability, precision long-range fire, and rapid threat response in both desert maneuver warfare and dense urban engagements.